Maybe "Pat-a-cake" is going on at halftime?
"Pat-a-cake" = is often accompanied by hand-clapping between two people, a clapping game known as pat-a-cake (also rendered as patty-cake or pattycake), after the rhyme. It alternates between a normal individual clap with two-handed claps with the other person. The hands may be crossed as well. This allows for a possibly complex sequence of clapping that must be coordinated between the two.